JP2005119416A - Electric working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform battery exchange operation in a short time. <P>SOLUTION: An upper side battery lock device 21 is composed of a hook receiving member 22 fixed to a left partition plate 9, a hook member 23 provided on a left battery case 13, and a hook moving member 26 which rotates the hook member 23 between a locking position and an unlocking position in conjunction with the movement of the left battery case 13. A lower side battery lock device 31 is composed of a hook receiving member 32 fixed to the left partition plate 9, a hook member 33 provided on the left battery case 13, and a hook moving member 35 which rotates the hook member 33 between the locking position and the unlocking position in conjunction with the movement of the left battery case 13. When mounting and dismounting the left battery case 13, locking and unlocking for the left battery case 13 can be easily performed in conjunction with the mounting and dismounting thereby. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric work machine that is suitably used as, for example, a construction machine, an industrial machine, and the like, and is provided with an electric power source and a battery on a vehicle body.

  In general, a construction machine such as a hydraulic excavator used for excavation work or dismantling work is provided with an engine as a power source, and a hydraulic pump is driven by the engine to drive a traveling hydraulic motor, a turning hydraulic motor, and a working device. The hydraulic oil for operation is supplied to the various hydraulic cylinders and the like constituting the.

  On the other hand, for example, when performing excavation work or dismantling work in a building such as a warehouse, an electric motor equipped with an electric power source such as an electric motor is used to prevent the working environment from being lowered by exhaust gas from the engine. A hydraulic excavator of the type is known.

  Here, when electric power is supplied from an external power source to the electric motor mounted on the electric excavator, it is necessary to connect the electric motor and the external power source via a cable. However, when the electric motor and the external power supply are connected via a cable, the operating range of the hydraulic excavator is limited by the length of the cable, and the cable and the hydraulic excavator are used when the hydraulic excavator is running or turning. There is a risk of interference.

  On the other hand, a battery-mounted hydraulic excavator has been proposed in which a battery is mounted on a vehicle body and the electric motor is driven by supplying power to the electric motor from the battery (see, for example, Patent Document 1). ).

JP-A-9-158247

  The battery-mounted hydraulic excavator according to this prior art consumes the battery by driving the electric motor. Therefore, when excavation work or the like is performed using the hydraulic excavator for a long time, it is charged instead of the exhausted battery. It is necessary to replace the attached battery and attach it to the vehicle body.

  In this case, the battery-mounted hydraulic excavator according to the prior art is configured such that after the battery to be replaced is mounted on the vehicle body, the battery is locked (fixed) to the vehicle body using a plurality of bolts or the like.

  However, since the battery-mounted hydraulic excavator according to the above-described prior art is configured to lock the battery to the vehicle body using a plurality of bolts or the like, the work of loosening the plurality of bolts is not necessary when removing the exhausted battery from the vehicle body. When attaching a charged battery to the vehicle body, it is necessary to tighten a plurality of bolts, and there is a problem that it takes a lot of time to replace the battery.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide an electric work machine that can easily perform battery replacement work in a short time.

  In order to solve the above-described problems, the present invention provides a vehicle body on which an electric power source is mounted, a battery case that is attached to the vehicle body, is detachably provided, and has a battery housed therein for supplying power to the power source; The present invention is applied to an electric work machine including a battery lock device that locks a battery case with respect to a vehicle body.

  According to a first aspect of the present invention, the battery lock device includes a hook receiving member that is fixed to the vehicle body, and a battery case that is attached to and detached from the hook receiving member. A hook member that moves between a lock position that locks against the lock position and a lock release position that releases the lock state, and a hook member that is connected to the hook member and locked to the vehicle body when the battery case is attached to or removed from the vehicle body. And a hook moving member that moves between the unlocking position and the unlocking position.

  According to a second aspect of the present invention, the battery lock device includes: an upper battery lock device that locks the upper portion of the battery case with respect to the vehicle body; and a lower battery lock device that locks the lower portion of the battery case with respect to the vehicle body. It is in the configuration.

  According to a third aspect of the present invention, the hook moving member of the upper battery lock device includes a pin coupling portion that is pivotally coupled to the hook member, and extends upward from the pin coupling portion and protrudes from the upper surface of the battery case. When the battery case is attached to the vehicle body, the hook part is pulled into the battery case by its own weight, so that the hook member is moved to the locked position. When removing from the vehicle body upward, the lifting portion is pulled upward from the battery case to move the hook member to the unlock position.

  According to a fourth aspect of the present invention, the hook moving member of the lower battery lock device includes a pin coupling portion that is pivotally coupled to the hook member, and extends downward from the pin coupling portion and projects from the lower surface of the battery case. When the battery case is attached to the vehicle body, the hook member is moved to the locked position by pulling the leg portion into the battery case in conjunction with the movement of the battery case, and when the battery case is removed upward from the vehicle body. The leg portion protrudes downward from the battery case by its own weight to move the hook member to the unlocked position.

  According to the first aspect of the present invention, when the battery case is attached to the vehicle body, the hook moving member moves the hook member to the lock position so that the hook member can be engaged with the hook receiving member fixed to the vehicle body. . Thereby, only by attaching the battery case which accommodated the charged battery to a vehicle body, the said battery case can be easily locked to a vehicle body, without using a volt | bolt etc. On the other hand, when removing the battery case from the vehicle body, the hook moving member moves the hook member to the unlocked position, so that the hook member can be detached from the hook receiving member. As a result, the battery case containing the exhausted battery can be easily removed from the vehicle body. Therefore, it is possible to perform a work for replacing a consumed battery with a charged battery in a short time, and to improve the workability.

  According to the second aspect of the present invention, the upper part of the battery case can be locked by the upper battery lock device, and the lower part of the battery case can be locked by the lower battery lock device. It can be securely fixed.

  According to the invention of claim 3, when the battery case is attached to the vehicle body, the hook member can be moved to the lock position by the lifting portion of the hook moving member being pulled into the battery case by its own weight. On the other hand, when the battery is removed upward from the vehicle body, the hook member can be moved to the unlocking position by pulling the lifting portion of the hook moving member upward.

  According to the invention of claim 4, when the battery case is attached to the vehicle body, the hook member is moved to the lock position by the leg portion of the hook moving member being pulled into the battery case in conjunction with the movement of the battery case. be able to. On the other hand, when the battery case is removed upward from the vehicle body, the leg member protrudes downward from the battery case by its own weight, so that the hook member can be moved to the unlocking position.

  Hereinafter, a case where an embodiment of an electric work machine according to the present invention is applied to a hydraulic excavator will be described as an example, and will be described in detail with reference to FIGS. 1 to 8.

  In the figure, 1 is an electric hydraulic excavator. The hydraulic excavator 1 is mounted on a self-propelled crawler type lower traveling body 2 and can be turned on the lower traveling body 2, together with the lower traveling body 2. The upper revolving structure 3 constituting the vehicle body and the working device 4 that is provided on the front side of the upper revolving structure 3 so as to be able to move up and down and perform excavation work such as earth and sand are roughly constituted.

  Here, the upper swing body 3 includes a swing frame 5 that forms a support structure formed in a substantially circular shape when viewed from above, a driver seat 6 disposed on the swing frame 5, and an upper portion of the driver seat 6. The canopy 7 is generally constituted by a covering canopy 7 and partition plates 9, 10, 11 described later surrounding the driver's seat 6. In addition, an electric motor 8 as an electric power source is mounted on the rear side of the driver's seat 6, and the electric motor 8 is supplied with power from each of battery cases 13, 14, 15, which will be described later. (Not shown).

  9 is a left partition plate erected on the left side of the swivel frame 5, and the left partition plate 9 is formed by bending a thick steel plate or the like into a substantially U shape as shown in FIGS. It is formed and rises upward from the swivel frame 5. And the left partition plate 9 partitions between the driver's seat 6 and a left battery case 13 to be described later, and the side opposite to the driver seat 6 of the left partition plate 9 is a battery housing portion 9A, and the battery housing portion 9A. Each hook receiving member 22 and the like which will be described later are fixed inside.

  Reference numeral 10 denotes a right partition plate erected on the right side of the revolving frame 5. The right partition plate 10 is formed by bending a thick steel plate or the like, and is formed between a driver seat 6 and a right battery case 14 to be described later. It is a partition. The right partition plate 10 is on the opposite side of the driver seat 6 from the battery housing portion 10A, and hook receiving members 22 and the like to be described later are fixed inside the battery housing portion 10A.

  11 is a rear partition plate erected on the rear side of the revolving frame 5. The rear partition plate 11 is formed by bending a thick steel plate or the like. It is a partition. The rear partition plate 11 has a battery housing portion 11A on the opposite side to the driver's seat 6, and hook receiving members 22 and the like to be described later are fixed inside the battery housing portion 11A.

  Reference numeral 12 denotes a passage portion provided around the driver's seat 6 surrounded by the partition plates 9, 10, and 11. The passage portion 12 forms a walk-through extending forward of the driver's seat 6. The operator gets on and off the driver's seat 6 through the passage portion 12 from the front side of the excavator 1.

  13 is a left battery case mounted in the battery housing portion 9A of the left partition plate 9, 14 is a right battery case mounted in the battery housing portion 10A of the right partition plate 10, and 15 is a battery housing portion of the rear partition plate 11. Each battery case 13, 14, 15 is a battery case that is mounted in 11 </ b> A and houses a battery that supplies power to the electric motor 8. And each battery case 13,14,15 is provided with respect to each corresponding partition plate 9,10,11 so that removal is possible.

  Here, the battery cases 13, 14, and 15 are different in external shape, but have the same basic configuration. Therefore, the left battery case 13 will be described below, and the other right battery case 14 and rear battery case 15 will be described. Description of is omitted.

  Reference numeral 13 denotes a left battery case which is attached to and detachable from the battery accommodating portion 9A of the left partition plate 9, and the left battery case 13 is formed in a box shape extending upward and downward as shown in FIG. The battery 16 for supplying power to the electric motor 8 is accommodated therein.

  Here, the left battery case 13 is formed as a box surrounded by a front plate 13A, a rear plate 13B, a left side plate 13C, a right side plate 13D, an upper plate 13E, and a lower plate 13F. Further, on the front plate 13A, the rear plate 13B, and the right side plate 13D of the battery case 13, four upper openings 13G, 13G,... (Only three are shown) corresponding to the upper battery lock device 21 described later, Four lower openings 13H, 13H,... (Only three are shown) corresponding to the side battery lock device 31 are formed.

  .. Are four upper battery lock devices provided between the left partition plate 9 and the upper corner of the left battery case 13, and each of the upper battery lock devices 21 is shown in FIGS. As shown in FIG. 2, the upper and lower battery lock devices 31 described below are paired in the upward and downward directions. The upper and lower battery lock devices 21 and 31 lock the left battery case 13 to the left partition plate 9 when the left battery case 13 is attached to the battery housing portion 9A of the left partition plate 9. is there.

  An upper battery lock device 21 and a lower battery lock device 31 that are paired in the upper and lower directions between the right partition plate 10 and the right battery case 14 and between the rear partition plate 11 and the rear battery case 15. And are provided. Therefore, hereinafter, the upper and lower battery locking devices 21 and 31 provided between the left partition plate 9 and the left battery case 13 will be described, and the rear partition between the right partition plate 10 and the right battery case 14 will be described. Description of the upper and lower battery lock devices 21 and 31 provided between the plate 11 and the rear battery case 15 is omitted.

  First, each upper battery lock device 21 is provided between the left partition plate 9 and the upper corner portion of the left battery case 13, and as shown in FIGS. 23, a hook moving member 26 and the like.

  Reference numeral 22 denotes a hook receiving member fixed to the left partition plate 9. The hook receiving member 22 is formed, for example, by bending a round bar into a U-shape, and is welded to the left partition plate 9. It is fixed using. The hook receiving member 22 projects into the battery housing portion 9A, and the hook member 23 engages and disengages.

  Reference numeral 23 denotes a hook member provided in the battery case 13 of the left battery case 13, and the hook member 23 includes two plate bodies 23A and 23A formed in an L shape as shown in FIGS. And a shaft 23B connecting the intermediate portions in the length direction of the respective plate bodies 23A, and the distal end portion of each plate body 23A is a claw portion 23C bent upward to engage with the hook receiving member 22. It has become. Then, both end sides in the length direction of the shaft 23B connecting the plates 23A are rotatably supported by a pair of support brackets 24, 24 fixed to the upper surface plate 13E of the battery case 13.

  As a result, the hook member 23 is centered on the shaft 23B, and the claw portions 23C of the plate bodies 23A that protrude to the outside of the battery case 13 through the upper opening 13G are connected to the hooks of the left partition plate 9 as shown in FIG. A configuration in which the claw portion 23C of each plate member 23A rotates upward and downward between a lock position that engages with the member 22 and a lock release position that separates from the hook receiving member 22 as shown in FIG. It has become.

  Reference numeral 25 denotes a stopper pin provided between the pair of support brackets 24. The stopper pin 25 is disposed below the shaft 23B of the hook member 23 and extends in parallel with the shaft 23B. Then, when the hook member 23 is rotated to the unlocking position shown in FIG. 8, the stopper pin 25 abuts against each plate body 23A of the hook member 23 so that the hook member 23 is further downward. The rotation is restricted.

  Reference numeral 26 denotes a hook moving member connected to the hook member 23. The hook moving member 26 rotates the hook member 23 between a lock position and a lock release position. The hook moving member 26 includes a pin coupling portion 26A coupled between the plate bodies 23A of the hook member 23 using pins 27, and a rod-shaped lifting portion 26B extending upward from the pin coupling portion 26A. ing.

  Here, the pin coupling portion 26A of the hook moving member 26 is a base end portion on the opposite side to the distal end portion where the claw portion 23C is provided across the shaft 23B among the plate bodies 23A constituting the hook member 23. Between them, pins 27 are pivotally connected using pins 27. On the other hand, the lifting portion 26B of the hook moving member 26 has its lower end side fixed to the pin coupling portion 26A and extending vertically upward, and its upper end side passes through the upper hole 13J provided in the upper surface plate 13E of the battery case 13 and the upper surface plate 13E. Projecting upward. Further, the upper end portion of the lifting portion 26B becomes an annular rope attachment portion 26C, and the left battery case 13 is accommodated in the left partition plate 9 by attaching the wire rope 28 to the rope attachment portion 26C and pulling up the lifting portion 26B. It is configured to be removable upward from the portion 9A.

  Then, as shown in FIG. 7, when the left battery case 13 is lowered to the battery accommodating portion 9A of the left partition plate 9, the lifting portion 26B of the hook moving member 26 is pulled into the left battery case 13 by its own weight. The member 23 rotates about the shaft 23B, and the hook member 23 is configured to hold the locked position where the claw portion 23C is engaged with the hook receiving member 22 of the left partition plate 9.

  On the other hand, as shown in FIG. 8, in order to remove the left battery case 13 from the battery accommodating portion 9A of the left partition plate 9, a wire rope 28 is attached to a rope attachment portion 26C provided on the lifting portion 26B of the hook moving member 26, When the lifting portion 26B is pulled upward by the wire rope 28, the hook member 23 rotates about the shaft 23B, and the claw portion 23C holds the unlocking position where it is detached from the hook receiving member 22 of the left partition plate 9. It has a configuration.

  Reference numeral 29 denotes a holder member provided between the hook moving member 26 and the battery case 13, and the holder member 29 serves to securely hold the hook member 23 in the locked position shown in FIG.

  Here, the holder member 29 is fixed to the upper surface plate 13E of the battery case 13 and has a cylindrical female screw member 29A in which a female screw is screwed on the inner peripheral side, and an outer peripheral side screwed into the female screw member 29A and hooked on the inner peripheral side. A stepped cylindrical male screw member 29B in which the lifting portion 26B of the moving member 26 is loosely inserted, and a stopper member 29C that is fixed to the intermediate portion in the longitudinal direction of the lifting portion 26B of the hook moving member 26 and restricts the movement of the male screw member 29B. It is comprised by.

  As shown in FIG. 7, when the male screw member 29 </ b> B is screwed into the female screw member 29 </ b> A of the holder member 29 in a state where the left battery case 13 is attached to the battery housing portion 9 </ b> A of the left partition plate 9, The stopper member 29C fixed to the lifting portion 26B comes into contact with the lower surface of the male screw member 29B. Accordingly, the hook moving member 26 can be prohibited from moving upward and downward, and the hook member 23 can be reliably held at the lock position.

  31 are four lower battery lock devices (only three are shown) provided between the left partition plate 9 and the lower corner of the left battery case 13, and each of the lower battery locks. The device 31 is provided at a position that overlaps with the above-described upper battery lock devices 21 in the upward and downward directions. Each lower battery lock device 31 includes a hook receiving member 32, a hook member 33, a hook moving member 35, and the like, which will be described later.

  Reference numeral 32 denotes a hook receiving member fixed to the left partition plate 9. The hook receiving member 32 is disposed below each hook receiving member 22 constituting the upper battery lock device 21 and welded to the left partition plate 9. It is fixed using such means. The hook receiving member 32 projects into the battery housing portion 9A, and the hook member 33 engages and disengages.

  Reference numeral 33 denotes a hook member provided in the battery case 13 of the left battery case 13, and the hook member 33 includes two plate bodies 33A and 33A formed in an L shape as shown in FIGS. And a shaft 33B connecting the base end portions in the length direction of the respective plate bodies 33A, and the distal end portion of each plate body 33A is a claw portion that is bent upward to engage with the hook receiving member 32. 33C. Then, both end sides in the length direction of the shaft 33B connecting the plates 33A are rotatably supported by a pair of support brackets 34, 34 provided upright on the lower surface plate 13F of the battery case 13.

  As a result, the hook member 33 is centered on the shaft 33B, and the claw portions 33C of the plate bodies 33A protruding to the outside of the battery case 13 through the lower opening 13H are hooked to the left partition plate 9 as shown in FIG. A configuration in which the claw portion 33C of each plate 33A rotates upward and downward between a locking position where the receiving member 32 is engaged and a lock releasing position where the claw portion 33C of each plate 33A is detached from the hook receiving member 32 as shown in FIG. It has become.

  Reference numeral 35 denotes a hook moving member connected to the hook member 33. The hook moving member 35 rotates the hook member 33 between a locked position and an unlocked position, and between each plate 33A of the hook member 33. And a pin coupling portion 35A coupled to each other using a pin 36, and a leg portion 35B extending downward from the pin coupling portion 35A.

  Here, the pin coupling portion 35A of the hook moving member 35 is between the base end portion provided with the shaft 33B and the distal end portion provided with the claw portion 33C among the plate bodies 33A constituting the hook member 33. The pin 36 is pivotally connected using a pin 36. On the other hand, the leg portion 35B of the hook moving member 35 has its upper end fixed to the pin coupling portion 35A and extending vertically downward, and its lower end is connected to the lower surface plate 13F through a lower hole 13K provided in the lower surface plate 13F of the battery case 13. Projecting downward from Further, the lower end portion of the leg portion 35 </ b> B protruding from the lower surface plate 13 </ b> F of the battery case 13 is a flat contact surface portion 35 </ b> C that contacts the upper surface of the turning frame 5.

  As shown in FIG. 7, when the left battery case 13 is attached to the battery housing portion 9 </ b> A of the left partition plate 9, the abutting surface portion 35 </ b> C of the leg portion 35 </ b> B constituting the hook moving member 35 is The pin coupling portion 35A of the hook moving member 35 is pushed upward by colliding with. Accordingly, the hook member 33 is rotated about the shaft 33B, and the claw portion 33C is configured to hold the lock position where the hook member 33 is engaged with the hook receiving member 32 of the left partition plate 9.

  On the other hand, as shown in FIG. 8, when the left battery case 13 is removed upward from the battery housing portion 9 </ b> A of the left partition plate 9, the leg portion 35 </ b> B of the hook moving member 35 protrudes downward from the left battery case 13 due to its own weight. As a result, the hook member 33 is configured to rotate about the shaft 33B to the unlocked position where the claw portion 33C is detached from the hook receiving member 32 of the left partition plate 9.

  The electric excavator 1 according to the present embodiment has the above-described configuration. When the electric motor 8 is rotated by power supplied from the battery 16 accommodated in each of the battery cases 13, 14, 15, the electric motor 8 By this, a hydraulic pump (not shown) is driven. The hydraulic oil from the hydraulic pump is supplied to a hydraulic actuator mounted on the hydraulic excavator 1 so that the hydraulic excavator 1 travels and turns, and excavation work, dismantling work, and the like using the work device 4 are performed. It can be performed.

  In this case, since the excavator 1 according to the present embodiment uses the electric motor 8 as a power source, for example, when excavation work or dismantling work is performed in a building such as a warehouse, work is performed using exhaust gas from the engine. It is possible to prevent the environment from deteriorating.

  Further, the hydraulic excavator 1 supplies power to the electric motor 8 by the batteries 16 in the battery cases 13, 14, 15 mounted on the upper swing body 3, so that it is not necessary to use an external power source. Therefore, a cable for connecting the electric motor 8 and the external power supply can be eliminated, and the working range of the hydraulic excavator 1 can be ensured.

  Here, when the battery 16 in each of the battery cases 13, 14, 15 is exhausted due to the operation of the excavator 1 for a long time, each of the battery cases 13, 14 containing the exhausted battery 16 is exhausted. , 15 need to be replaced with battery cases 13, 14, 15 containing a charged battery 16. Therefore, an exchange operation for exchanging the left battery case 13 containing the exhausted battery 16 with the left battery case 13 containing the charged battery 16 will be described below.

  First, when the left battery case 13 containing the exhausted battery 16 is removed from the battery accommodating portion 9A of the left partition plate 9, the male screw member 29B of the holder member 29 is removed from the female screw member 29A as shown in FIG. . Then, a wire rope 28 is attached to the rope attachment portion 26C of the hook moving member 26 constituting the upper battery lock device 21, and the wire rope 28 is pulled upward using a hydraulic crane or the like (not shown).

  As a result, the lifting portion 26B of the hook moving member 26 is pulled upward by the wire rope 28, and the hook member 23 rotates downward about the shaft 23B. Then, the claw portion 23C of the hook member 23 is detached from the hook receiving member 22 of the left partition plate 9, whereby the left battery case 13 can be lifted upward.

  On the other hand, when the left battery case 13 is lifted upward, the leg portion 35B of the hook moving member 35 is pulled into the left battery case 13 by its own weight. As a result, the hook member 33 rotates about the shaft 33B to the unlocking position, and the claw portion 33C of the hook member 33 is detached from the hook receiving member 32 of the left partition plate 9.

  In this way, the hook member 23 of the upper battery lock device 21 and the hook member 33 of the lower battery lock device 31 can be held in the unlocked position simply by lifting the left battery case 13 upward. The left battery case 13 can be easily removed from the battery housing portion 9A of the left partition plate 9 provided on the revolving frame 5.

  Similarly to the left battery case 13, the right battery case 14 can be easily removed from the battery housing portion 10 </ b> A of the right partition plate 10, and the rear battery case 15 can be easily removed from the battery housing portion 11 </ b> A of the rear partition plate 11. Can be removed.

  Next, when attaching the left battery case 13 accommodating the charged battery 16 to the battery accommodating portion 9A of the left partition plate 9, as shown in FIG. 8, the male screw member 29B of the holder member 29 is replaced with the female screw member 29A. The wire rope 28 is attached to the rope attachment portion 26 </ b> C of the hook moving member 26 constituting the upper battery lock device 21 in a state where the wire rope 28 is removed from the wire.

  Then, the left battery case 13 is lifted by pulling the wire rope 28 upward using a hydraulic crane or the like (not shown), and the left battery case 13 is lowered into the battery accommodating portion 9 </ b> A of the left partition plate 9.

  Here, when the lifted left battery case 13 is lowered to the battery accommodating portion 9A of the left partition plate 9, as shown in FIG. 7, the abutting surface portion 35C of the hook moving member 35 constituting the lower battery locking device 31 is obtained. However, by abutting against the upper surface of the turning frame 5, the pin coupling portion 35A of the hook moving member 35 is pushed upward. As a result, the hook member 33 rotates to the lock position about the shaft 33B, and the claw portion 33C of the hook member 33 engages with the hook receiving member 32 of the left partition plate 9.

  Then, after the left battery case 13 is attached to the battery housing part 9A of the left partition plate 9, the wire rope 28 is removed from the rope attaching part 26C of the hook moving member 26 constituting the upper battery lock device 21. As a result, the lifting portion 26B of the hook moving member 26 is pulled into the left battery case 13 by its own weight, and the hook member 23 rotates to the lock position about the shaft 23B, so that the claw portion 23C of the hook member 23 is The hook receiving member 22 of the left partition plate 9 is engaged.

  In this way, the lower battery lock device 31 can be used to lower the lower part of the left battery case 13 without using bolts or the like by simply attaching the suspended left battery case 13 to the battery housing portion 9A of the left partition plate 9 and attaching it. The upper part of the left battery case 13 can be fixed to the left partition plate 9 by the upper battery lock device 21.

  In this state, when the male screw member 29B is screwed into the female screw member 29A of the holder member 29, the stopper member 29C fixed to the lifting portion 26B of the hook moving member 26 comes into contact with the lower surface of the male screw member 29B. As a result, the hook moving member 26 can be prevented from inadvertently moving upward and downward, and the hook member 23 of the upper battery lock device 21 is securely held in the locked position when the excavator 1 is in operation. Can be kept.

  In this way, the hook member 23 of the upper battery lock device 21 and the hook member 33 of the lower battery lock device 31 are locked only by lifting the left battery case 13 and attaching it to the battery accommodating portion 9A of the left partition plate 9. The left battery case 13 can be easily fixed to the battery housing portion 9A of the left partition plate 9 without using bolts or the like.

  Moreover, since the upper part of the left battery case 13 can be locked by the upper battery lock device 21 and the lower part of the left battery case 13 can be locked by the lower battery lock device 31, the left battery case 13 can be 9 can be firmly fixed.

  And like the left battery case 13 mentioned above, while the right battery case 14 can be easily attached to the battery accommodating part 10A of the right partition plate 10, the rear battery case 15 is attached to the battery accommodating part 11A of the rear partition plate 11. Can be easily installed.

  Thus, according to the present embodiment, the upper battery lock device 21 is fixed to the left partition plate 9, the hook receiving member 22, the lock position and the hook provided on the left battery case 13 and engaged with the hook receiving member 22. The hook member 23 that rotates between the unlocking position to be detached from the receiving member 22 and the attachment and removal of the left battery case 13 rotate the hook member 23 between the locking position and the unlocking position. The hook moving member 26 is used.

  Also, the lower battery lock device 31 is fixed to the left partition plate 9, the hook receiving member 32 is fixed, the lock position provided on the left battery case 13 is engaged with the hook receiving member 32, and the unlocking is released from the hook receiving member 32. And a hook moving member 35 that rotates the hook member 33 between a locked position and an unlocked position in conjunction with the attachment and removal of the left battery case 13. ing.

  Accordingly, the electric excavator 1 according to the present embodiment can easily lift the battery case 13 from the left partition plate 9 only by lifting the left battery case 13 upward from the battery housing portion 9A of the left partition plate 9. The left battery case 13 can be removed and attached, and the left battery case 13 can be easily fixed to the left partition plate 9 without performing a fixing operation using bolts or the like by simply attaching the lifted left battery case 13 to the battery housing portion 9A. can do.

  Therefore, the work for replacing the left battery case 13 containing the exhausted battery 16 with the left battery case 13 containing the charged battery 16 can be performed in a short time, and the workability can be improved. . Similarly to this, the work for exchanging the right battery case 14 and the rear battery case 15 can be performed in a short time, and the workability can be improved.

  In the above-described embodiment, the case where the upper battery lock device 21 and the lower battery lock device 31 are provided between the left partition plate 9 and the left battery case 13 constituting the vehicle body is illustrated. However, the present invention is not limited to this. For example, only the upper battery lock device 21 may be provided, or only the lower battery lock device 31 may be provided. The same applies to the battery lock device provided between the right partition plate 10 and the right battery case 14 and the battery lock device provided between the rear partition plate 11 and the rear battery case 15.

  Moreover, in embodiment mentioned above, the case where the partition plates 9, 10, and 11 are set up on the turning frame 5, and the hook receiving members 22 and 32 are fixed to these left partition plates 9, 10, and 11 is illustrated. ing. However, the present invention is not limited to this. For example, the hook receiving member may be fixed to another member such as the turning frame 5.

  Furthermore, in embodiment mentioned above, the hydraulic excavator 1 used for excavation work, such as earth and sand, is illustrated as an electrically-driven working machine. However, the present invention is not limited to this, and can be widely applied to other work machines such as a lift truck used for cargo handling work.

1 is a front view showing an electric hydraulic excavator according to an embodiment of the present invention. FIG. 3 is a plan view of the electric excavator as viewed from above with the working device removed. It is a perspective view which shows the left partition plate and left battery case which were provided in the hydraulic excavator. It is a perspective view which shows a left battery case alone. It is the perspective view which expanded the upper battery locking device in FIG. It is the perspective view which expanded the lower battery locking device in FIG. It is sectional drawing seen from the arrow VII-VII direction in FIG. 2 which shows the state in which the left battery case was locked. It is sectional drawing of the same position as FIG. 7 which shows the state by which the lock | rock of the left battery case was cancelled | released.

Explanation of symbols

3 Upper swing body (car body)
5 Revolving frame 8 Electric motor (power source)
9 Left partition plate 10 Right partition plate 11 Rear partition plate 13 Left battery case 14 Right battery case 15 Rear battery case 21 Upper battery lock device 22, 32 Hook receiving member 23, 33 Hook member 26 Hook moving member 26A Pin coupling portion 26B Lifting Part 31 Lower battery lock device 35 Hook moving member 35A Pin coupling part 35B Leg part

Claims (4)

A vehicle body on which an electric power source is mounted, a battery case that is attached to the vehicle body and is detachably provided to supply power to the power source, and the battery case is attached to the vehicle body. In an electric work machine comprising a battery lock device for locking,
The battery lock device includes a hook receiving member that is fixed to the vehicle body, and a lock that locks the battery case with respect to the vehicle body by engaging and disengaging the hook receiving member provided on the battery case. A hook member that moves between a position and an unlocked position that releases the locked state; and a hook member that is connected to the hook member and is attached to and detached from the vehicle body, An electric work machine characterized by comprising a hook moving member that moves between the unlocked positions.   The battery lock device includes an upper battery lock device that locks an upper portion of the battery case with respect to the vehicle body, and a lower battery lock device that locks a lower portion of the battery case with respect to the vehicle body. The electric work machine according to claim 1 formed.   A hook moving member of the upper battery lock device includes a pin coupling portion that is pivotally coupled to the hook member, and an upwardly extending from the pin coupling portion, protruding from the upper surface of the battery case, and mounting the battery case. A lifting part that is pulled upward when performing removal, and when the battery case is attached to the vehicle body, the lifting part is pulled into the battery case by its own weight to move the hook member to the lock position; The electric work machine according to claim 2, wherein when the battery case is removed upward from the vehicle body, the lifting member is pulled upward from the battery case to move the hook member to the unlocked position.   The hook moving member of the lower battery lock device includes a pin coupling portion that is pivotally coupled to the hook member, and a leg portion that extends downward from the pin coupling portion and projects from the lower surface of the battery case. When the battery case is attached to the vehicle body, the leg member is retracted into the battery case in conjunction with the movement of the battery case to move the hook member to the lock position, and the battery case is moved to the vehicle body. The electric work machine according to claim 2, wherein when the upper part is removed upward, the hook part is moved to the unlocking position by projecting the leg part downward from the battery case by its own weight.

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